Need Some Help in Designing Plate Bending Machine.

Hi... Everyone...

I am designing 3 roller type pyramidal plate bending machine with pre bending facility.

Machine's capacity will be to bend M.S. Plate of Thickness 40 MM & 3000 MM Width.

Both the Bottom Rollers Will be Driven By Planetory Gear Box .

Top Roller Dia is 450 MM (Material EN8 Forged)

Bottom Rollers Dia is 390 MM (Material En8 Forged)

Minimum Dia of 40MM Thickess which shall be bend is 1800 MM

Top Roller of the machine will be fixed & bottom rollers will move up & down with the help of hydraulic Jacks.

I want the RPM of Bottom Rollers 1 to 1.5 RPM

kindly help me in this points :

1. What Size of Jack & Cylinder I should use for bottom Rollers ?

2. How Much Hydraulic pressure will be required to successfully bend 40 MM thickness Cylinder ?

3.Size of planetory gear box i should use ? ( I am thinking to buy of boschrexroth make) If want me to use any other company kindly suggest ?

4. Torque of the required gear box ?

5. Electric Motor in H.P. to be used in each bottom roller ? & RPM of motor ?

i will be very thankful to you .

Kindly contact me at

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